a little more to it than that in CO.
TRESPASSING. Going onto private lands without getting permission first while hunting, fishing or performing any related activity is illegal. Private lands do not need to be posted or fenced, so it can be difficult to see boundaries. Violators may be suspended for up to 5 years for trespassing. This includes State Land Board properties not leased and signed by CPW, unless permission is given by the lessee. You must have permission from the landowner to enter private land to retrieve a harvested animal. First, you should try to contact the landowner on your own. If that effort fails, call the local CPW office